/* ============================================================
   CHECKJEAUTO.NL — Gedeelde Stijlen
   Design: Spense-stijl, mobile-first, dark mode
   Font: Plus Jakarta Sans
   ============================================================ */


/* ---------- CSS Custom Properties (Design Tokens) ---------- */
:root {
  /* Kleuren */
  --color-bg:             #ffffff;
  --color-muted:          #f2f4f7;
  --color-surface:        #ffffff;
  --color-text:           #0f1928;
  --color-text-secondary: #6a7380;
  --color-border:         #e8ecf0;
  --color-primary:        #0168e7;
  --color-primary-hover:  #0152c4;
  --color-btn-dark:       #0f1928;
  --color-optie1:         #0168e7;
  --color-optie1-light:   rgba(1, 104, 231, 0.10);
  --color-optie2:         #16a34a;
  --color-optie2-light:   rgba(22, 163, 74, 0.10);
  --color-error:          #dc2626;
  --color-success:        #16a34a;
  --color-warning:        #d97706;

  /* Radius */
  --radius:               12px;
  --radius-sm:            8px;
  --radius-lg:            20px;

  /* Shadow */
  --shadow:               0 1px 4px rgba(0, 0, 0, 0.06), 0 4px 16px rgba(0, 0, 0, 0.04);
  --shadow-lg:            0 4px 24px rgba(0, 0, 0, 0.08);

  /* Overig */
  --transition:           0.2s ease;
  --font-sans:            'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont,
                          'Segoe UI', Roboto, sans-serif;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ---------- Layout ---------- */
.container { width: 100%; max-width: 960px; margin: 0 auto; padding: 0 20px; }

/* ---------- Header & Navigatie ---------- */
.header {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  border-top: 3px solid var(--color-text);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0;
}

.header-content {
  display: flex;
  align-items: center;
  height: 64px;
  gap: 8px;
}

/* Logo */
.logo-link { text-decoration: none; color: inherit; flex-shrink: 0; }
.logo-link:hover { opacity: 0.8; }
.header-content .logo {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

/* Subtitle verbergen (nieuw ontwerp heeft geen subtitle) */
.header-content .subtitle { display: none; }

/* Nav */
.main-nav {
  display: flex;
  gap: 2px;
  justify-content: flex-end;
  align-items: center;
  flex-wrap: nowrap;
  margin-top: 0;
}
.nav-link {
  padding: 6px 13px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--color-text-secondary);
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-link:hover { color: var(--color-text); background: var(--color-muted); }
.nav-link.active {
  color: var(--color-primary);
  background: none;
  font-weight: 600;
}

/* Header actions wrapper (dark-mode + hamburger) */
.header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  margin-left: auto;
}

/* ---------- Cards ---------- */
.card {
  background: var(--color-muted);
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: none;
  padding: 28px 32px;
  margin-top: 20px;
}
.card-header { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.card-header h2 { font-size: 1.2rem; font-weight: 700; letter-spacing: -0.01em; }
.card-description { color: var(--color-text-secondary); font-size: 0.9rem; margin-bottom: 24px; line-height: 1.5; }

.step-badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--color-text); color: #fff;
  font-size: 0.8rem; font-weight: 700; flex-shrink: 0;
}
.result-badge { background: var(--color-success); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 24px; border: none; border-radius: var(--radius-sm);
  font-size: 0.95rem; font-weight: 600; cursor: pointer;
  transition: all var(--transition); font-family: var(--font-sans); white-space: nowrap;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(1, 104, 231, 0.25);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-dark { background: var(--color-btn-dark); color: #fff; }
.btn-dark:hover {
  background: #1a2537;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(15, 25, 40, 0.25);
}
.btn-dark:active { transform: translateY(0); }
.btn-dark:disabled { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-sm { padding: 7px 16px; font-size: 0.85rem; }

.btn-loader {
  display: inline-block; width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,0.3); border-top-color: #fff;
  border-radius: 50%; animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Form Elements ---------- */
.form-grid { display: grid; gap: 20px; }
.form-grid.cols-2 { grid-template-columns: 1fr 1fr; }
.form-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }

.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.85rem; font-weight: 600; color: var(--color-text-secondary); }

.form-group input[type="number"],
.form-group select {
  padding: 10px 14px; border: 1.5px solid var(--color-border); border-radius: var(--radius-sm);
  font-size: 0.95rem; font-family: var(--font-sans); color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition), box-shadow var(--transition);
  -moz-appearance: textfield;
}
.form-group input[type="number"]::-webkit-outer-spin-button,
.form-group input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(1, 104, 231, 0.12);
}

.form-stack { display: flex; flex-direction: column; gap: 16px; }

/* Input met unit prefix/suffix */
.input-with-unit {
  display: flex; align-items: center;
  border: 1.5px solid var(--color-border); border-radius: var(--radius-sm);
  overflow: hidden; transition: border-color var(--transition), box-shadow var(--transition);
  background: var(--color-surface);
}
.input-with-unit:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(1, 104, 231, 0.12);
}
.input-with-unit .unit-prefix { padding: 10px 0 10px 14px; font-size: 0.95rem; color: var(--color-text-secondary); font-weight: 500; }
.input-with-unit .unit-suffix { padding: 10px 14px 10px 4px; font-size: 0.8rem; color: var(--color-text-secondary); white-space: nowrap; }
.input-with-unit input {
  border: none; padding: 10px 8px; font-size: 0.95rem; font-family: var(--font-sans);
  color: var(--color-text); width: 100%; outline: none; background: transparent; -moz-appearance: textfield;
}
.input-with-unit input::-webkit-outer-spin-button,
.input-with-unit input::-webkit-inner-spin-button { -webkit-appearance: none; }

/* ---------- Slider ---------- */
.slider-group { display: flex; flex-direction: column; gap: 12px; }
.slider-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.slider-header label { font-size: 0.95rem; font-weight: 500; color: var(--color-text); }
.slider-value-display { display: flex; align-items: center; gap: 6px; background: var(--color-bg); border-radius: var(--radius-sm); padding: 4px 12px; }
.slider-value-display input {
  border: none; background: transparent; font-size: 1rem; font-weight: 600;
  color: var(--color-text); width: 70px; text-align: right; outline: none;
  font-family: var(--font-sans); -moz-appearance: textfield;
}
.slider-value-display input::-webkit-outer-spin-button,
.slider-value-display input::-webkit-inner-spin-button { -webkit-appearance: none; }
.slider-value-display .unit { font-size: 0.8rem; color: var(--color-text-secondary); }

input[type="range"] { -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 3px; background: var(--color-border); outline: none; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 24px; height: 24px; border-radius: 50%; background: var(--color-primary); cursor: pointer; box-shadow: 0 2px 6px rgba(1, 104, 231, 0.3); transition: transform var(--transition); }
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.15); }
input[type="range"]::-moz-range-thumb { width: 24px; height: 24px; border-radius: 50%; background: var(--color-primary); cursor: pointer; border: none; box-shadow: 0 2px 6px rgba(1, 104, 231, 0.3); }
.slider-labels { display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--color-text-secondary); }

/* ---------- Formule / Info box ---------- */
.formula-box { margin-top: 24px; padding: 16px 20px; background: var(--color-bg); border-radius: var(--radius-sm); border-left: 3px solid var(--color-primary); }
.formula-label { display: block; font-size: 0.75rem; font-weight: 600; color: var(--color-text-secondary); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 6px; }
.formula-box code { font-size: 0.85rem; color: var(--color-text); word-break: break-word; }

/* ---------- Result styling (gedeeld) ---------- */
.result-label { display: block; font-size: 0.85rem; font-weight: 500; color: var(--color-text-secondary); margin-bottom: 8px; }
.result-amount { display: block; font-size: 2rem; font-weight: 700; letter-spacing: -0.02em; }

/* ---------- Footer ---------- */
.footer {
  margin-top: 64px;
  padding: 48px 0 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.footer-tagline {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-width: 260px;
}

.footer-heading {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text);
  margin-bottom: 12px;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-nav a:hover { color: var(--color-primary); }

.footer-disclaimer {
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-top: 16px;
  opacity: 0.8;
}

.footer-bottom {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 0;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  flex-wrap: wrap;
}

.footer-sep {
  color: var(--color-border);
}

/* Fallback voor pagina's met old-style footer */
.footer > .container > p {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  padding: 16px 0;
}
.footer a { color: var(--color-primary); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

/* Responsive footer */
@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 480px) {
  .footer { padding-top: 36px; }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-bottom: 28px;
  }
  .footer-brand { grid-column: auto; }
  .footer-tagline { max-width: 100%; }
}

/* ---------- Utilities ---------- */
.hidden { display: none !important; }

/* ---------- Pagina-animatie (fade-in op load) ---------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

main {
  animation: fadeInUp 0.35s ease both;
}

/* Skeleton loader */
.skeleton {
  background: linear-gradient(90deg,
    var(--color-border) 25%,
    var(--color-bg) 50%,
    var(--color-border) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---------- Responsive (Tablet) ---------- */
@media (max-width: 768px) {
  .header-content { height: 56px; }
  .main-nav { gap: 2px; }
  .nav-link { padding: 5px 10px; font-size: 0.82rem; }
  .card { padding: 20px 24px; }
  .form-grid.cols-2,
  .form-grid.cols-3 { grid-template-columns: 1fr; }
}

/* ---------- Gebruiksteller badge ---------- */
.usage-counter {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin: 12px 0 4px;
  font-size: 0.82rem;
  color: var(--color-text-secondary);
}

.usage-counter-icon {
  font-size: 0.9rem;
  opacity: 0.7;
}

.usage-counter strong {
  color: var(--color-primary);
  font-weight: 600;
}

/* ---------- Dark Mode ---------- */
html.dark {
  --color-bg:             #0b1422;
  --color-muted:          #111e30;
  --color-surface:        #0b1422;
  --color-text:           #f8fafc;
  --color-text-secondary: #94a3b8;
  --color-border:         #1e2f44;
  --color-primary:        #3b82f6;
  --color-primary-hover:  #2563eb;
  --color-btn-dark:       #1e2d42;
  --color-optie1:         #3b82f6;
  --color-optie1-light:   rgba(59, 130, 246, 0.15);
  --color-optie2:         #22c55e;
  --color-optie2-light:   rgba(22, 163, 74, 0.15);
  --color-error:          #ef4444;
  --color-success:        #22c55e;
  --color-warning:        #f59e0b;
  --shadow:               0 1px 4px rgba(0, 0, 0, 0.40), 0 4px 16px rgba(0, 0, 0, 0.30);
  --shadow-lg:            0 4px 24px rgba(0, 0, 0, 0.50);
}

html.dark .header {
  background: rgba(11, 20, 34, 0.96);
  border-top-color: #1e2f44;
}

/* Dark mode knop (inline in flex header) */
.dark-mode-btn {
  position: static;
  transform: none;
  background: none;
  border: 1.5px solid var(--color-border);
  border-radius: 50%;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  flex-shrink: 0;
  color: var(--color-text-secondary);
}
.dark-mode-btn:hover {
  background: var(--color-muted);
  border-color: var(--color-text-secondary);
}

/* Hero heeft geen speciale achtergrond meer (Spense: wit) */

/* ---------- Hamburger menu ---------- */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}
.hamburger-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}
.hamburger-btn.hamburger-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger-btn.hamburger-open span:nth-child(2) { opacity: 0; }
.hamburger-btn.hamburger-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 640px) {
  .hamburger-btn { display: flex; }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 20px 16px;
    flex-direction: column;
    gap: 2px;
    z-index: 200;
    box-shadow: var(--shadow-lg);
  }
  .main-nav.nav-open { display: flex; }
  .nav-link { padding: 10px 14px; font-size: 0.9rem; border-radius: var(--radius-sm); }
  .dark-mode-btn { width: 30px; height: 30px; font-size: 0.85rem; }
}

/* ---------- Responsive (Mobiel) ---------- */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .card { padding: 18px 16px; border-radius: var(--radius); }
  .header-content { height: 54px; }
  .result-amount { font-size: 1.6rem; }
}

/* ---------- FAQ sectie ---------- */
.faq-section {
  margin-top: 32px;
  padding-bottom: 16px;
}

.faq-section h2 {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: 16px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.faq-item {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 24px;
  background: none;
  border: none;
  border-radius: 0;
  text-align: left;
  font-family: var(--font-sans);
  font-size: 0.97rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--transition);
}

.faq-question:hover {
  background: var(--color-muted);
}

.faq-question[aria-expanded="true"] {
  color: var(--color-primary);
}

.faq-chevron {
  flex-shrink: 0;
  flex-grow: 0;
  width: 20px;
  height: 20px;
  min-width: 20px;
  min-height: 20px;
  display: block;
  overflow: hidden;
  color: var(--color-text-secondary);
  transition: transform 0.25s ease;
}

.faq-question[aria-expanded="true"] .faq-chevron {
  transform: rotate(180deg);
  color: var(--color-primary);
}

/* Antwoord: standaard verborgen, zichtbaar met .faq-open */
.faq-answer {
  display: none !important;
  overflow: hidden;
}

.faq-answer.faq-open {
  display: block !important;
}

.faq-answer-inner {
  padding: 0 24px 18px;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.faq-answer-inner a {
  color: var(--color-primary);
  text-decoration: none;
}
.faq-answer-inner a:hover {
  text-decoration: underline;
}

@media (max-width: 480px) {
  .faq-question { padding: 14px 18px; font-size: 0.9rem; }
  .faq-answer-inner { padding: 0 18px 14px; }
  .faq-section h2 { font-size: 1.15rem; }
}